21368760

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25439}}^1$

素因数の和:25460

約数の個数: 64

約数和(自身を含む): 73267200

約数和(自身を除く): 51898440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25439, 50878, 76317, 101756, 127195, 152634, 178073, 203512, 254390, 305268, 356146, 381585, 508780, 534219, 610536, 712292, 763170, 890365, 1017560, 1068438, 1424584, 1526340, 1780730, 2136876, 2671095, 3052680, 3561460, 4273752, 5342190, 7122920, 10684380, 21368760]

約数ペア:

[(1, 21368760), (2, 10684380), (3, 7122920), (4, 5342190), (5, 4273752), (6, 3561460), (7, 3052680), (8, 2671095), (10, 2136876), (12, 1780730), (14, 1526340), (15, 1424584), (20, 1068438), (21, 1017560), (24, 890365), (28, 763170), (30, 712292), (35, 610536), (40, 534219), (42, 508780), (56, 381585), (60, 356146), (70, 305268), (84, 254390), (105, 203512), (120, 178073), (140, 152634), (168, 127195), (210, 101756), (280, 76317), (420, 50878), (840, 25439)]